Player performance: The quality and
consistency of their form
Player performance in relation to their club:
Are they the star player?
International status: How established are they
for their country?
Contract: Players with longer deals are more
expensive
Age: Younger players command higher fees
Position: Goal scorers are more expensive than
goalkeepers

Here are the five most valuable teenage footballers in the
Premier League, La Liga, Bundesliga, Serie A, and Ligue 1, ranked
in ascending order.

5. Gianluigi Donnarumma, AC Milan — €39 million (£34.1 million).

source

AK Bijuraj / Getty Images

Italian goalkeeper Gianluigi Donnarumma's talents belie his
years. The 18-year-old may lack experience but he is already a
first team staple at AC Milan.

Last season he made an astonishing 158 saves from 41 appearances
in all competitions and clearly has a promising future in
football.

That future is currently up in the air, though. This is because
Donnarumma has reportedly rejected an £80,000 per week contract
to stay at Milan, meaning he could be on the move in the summer
transfer window.

4. Renato Sanches, FC Bayern München — €45.4 million (£39.7 million).

source

David Ramos / Getty Images

Renato Sanches became a league champion with Benfica when he was
just 18 years old, in 2016. Later that summer he helped Portugal
win the European Championships and then secured a mega money move
to FC Bayern München.

Sanches has attracted comparisons to legendary Dutchman Edgar
Davids, not just because of his hairstyle, but also his playing
style. A defensive midfielder by trade, Sanches - now 19 - is yet
to break into the Bayern first team, but it is surely only a
matter of time before he ousts the likes of Arturo Vidal.